US3787156A - Press for treating products under high isostatic pressure - Google Patents

Press for treating products under high isostatic pressure Download PDF

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Publication number
US3787156A
US3787156A US00249149A US3787156DA US3787156A US 3787156 A US3787156 A US 3787156A US 00249149 A US00249149 A US 00249149A US 3787156D A US3787156D A US 3787156DA US 3787156 A US3787156 A US 3787156A
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US
United States
Prior art keywords
unit
recess
axial
high pressure
end closure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00249149A
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English (en)
Inventor
K Engedal
T Landa
P Johannsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3787156A publication Critical patent/US3787156A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B30B11/002—Isostatic press chambers; Press stands therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/021—Sealings between relatively-stationary surfaces with elastic packing

Definitions

  • ABSTRACT A process for treating products with high pressure includes a high pressure cylinder with end closures projecting thereinto and a press stand.
  • the supply of pressure medium is made through one end closure which includes a cylindrical unit with an axial and a radial channel, applied in an axially arranged recess in the end closure and sealed to the recess at its inner part and a second cylindrical unit with an axial chamber which is applied in a recess perpendicular to the axial recess and connected to the first unit.
  • the present invention relates to a press for treating products under high pressure, for example for isostatic compacting of powder bodies.
  • the press comprises a high pressure chamber consisting of a high pressure cylinder and end closures projecting into the cylinder and a press stand which surrounds the high pressure chamber during the pressing operation and takes up the axial forces exerted on the end closured by a pressure medium.
  • the press may be of the type described the invention are clear from the accompanying claims.
  • At least the part of the supply channel where the axial and radial parts of the supply channel meet is arranged inside a replaceable separate unit. If there is a rupture, therefore, it is limited to the replaceable unit and replacement of the whole end closure, which is very heavy and expensive, is avoided.
  • the advantage is also gained that the liquid sprayed out upon a rupture is only sprayed into a recess in the end closure. The liquid is thus prevented from shooting out with considerable force into working premises and causing damage to both people and material.
  • Another advantage with the replaceable units is that these can be manufactured in a higher quality than a large end closure and more easily be heat-treated to give them great ductility and strength.
  • FIG. I shows a press stand with one end of a pressure chamber having an end closure with a conduit for the supply of pressure medium to the pressure chamber
  • FIG. 2 shows on a larger scale a section through an end closure
  • FIG. 3 a detail of the connection between two components
  • FIG. 4 a view of an end closure and FIG. 5 a section through an end closure with an alternative embodiment of the lead-in for the pressure medium.
  • FIG. 1 designates a high pressure cylinder having an end closure 2 which projects slightly into the cylinder 1 and is sealed to the cylinder by means of a sealing ring 3 and a lower end closure 31.
  • the end closures at both ends of the cylinder 1 are kept in place by a press stand, having an upper yoke 36 and a lower yoke 37, which takes up the outwardly directed force generated by the pressure medium.
  • a press stand having an upper yoke 36 and a lower yoke 37, which takes up the outwardly directed force generated by the pressure medium.
  • the end closure 2 is an axial recess 4 and a radial recess 5 perpendicular to said axial recess.
  • a first cylindrical unit 6 which on the inside is sealed against the recess 4 by a compressible seal 7 on a level with the seal 3.
  • the unit 6 is provided with a central hole 8 extending from its inner end to the level of a hole 9 drilled from the side.
  • a second unit 10 which is provided with a central hole 11 is arranged in the recess 5 and connected to the unit 6 by means of a bushing 12 so that a tubular connection is obtained between the space 13 inside the cylinder 1 and a pressure medium source, not shown, through the holes 8, 9 and II drilled in the units 6 and I0 and a conduit connected to the unit 10.
  • the bushing 12 is arranged in recesses 14 and 15 of appropriate size in the units 6 and 10 and bridges the gap 16 between these.
  • the bushing is relatively thin-walled and provided with sealing rings 17 and 18 which at low pressure seal between the bushing 12 and surrounding walls in the recesses 14 and 15.
  • the bushings are expanded to make contact with the walls of the recesses l4 and 15 so that the direct contact prevents the seals from being pressed out into the gap between the elements and gives a reliable seal at high pressure. It is suitable to make the recess 5 and the unit 10 of such dimension that a substantial clearance 19 is obtained between the recess and the unit in it.
  • FIG. 5 of the device according to the invention there is a relatively shallow recess 21 in the end closure 2 for the first unit 22 which is provided with an axially drilled hole 23 and a radially drilled hole 24.
  • the second unit 25 is connected to the first unit 22 in the manner indicated in FIG. 3.
  • the unit 22 is connected at the bottom of the shallow recess 21 to a channel 26 drilled in the closure 2 with the help of a bushing 27 of the same type as the bushing 12.
  • Press for treating products with high pressure comprising a high pressure chamber comprising a high pressure cylinder with end closures projecting into the cylinder, and a press stand which surrounds the high pressure chamber during the pressing operation and takes up the axial forces exerted by a pressure medium in the pressure chamber on the end closures, in which, for the supply of pressure medium, one end closure contains a first cylindrical unit with an axial and a radial channel, which unit is applied in an axially arranged recess in the end closure and a compressible seal between the inner part of the first unit and the axial recess, and said one end closure further contains a second cylindrical unit having an axial channel, which unit is applied in a recess perpendicular to the axial recess and connected to the radial channel in the first unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
US00249149A 1971-05-06 1972-05-01 Press for treating products under high isostatic pressure Expired - Lifetime US3787156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE05877/71A SE346714B (enrdf_load_stackoverflow) 1971-05-06 1971-05-06

Publications (1)

Publication Number Publication Date
US3787156A true US3787156A (en) 1974-01-22

Family

ID=20267434

Family Applications (1)

Application Number Title Priority Date Filing Date
US00249149A Expired - Lifetime US3787156A (en) 1971-05-06 1972-05-01 Press for treating products under high isostatic pressure

Country Status (5)

Country Link
US (1) US3787156A (enrdf_load_stackoverflow)
JP (1) JPS5746959B1 (enrdf_load_stackoverflow)
FR (1) FR2135255B1 (enrdf_load_stackoverflow)
GB (1) GB1379058A (enrdf_load_stackoverflow)
SE (1) SE346714B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013394A (en) * 1974-08-19 1977-03-22 National Forge Company Hot isostatic press system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58157300U (ja) * 1982-04-13 1983-10-20 株式会社神戸製鋼所 熱間静水圧成形装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061877A (en) * 1959-11-05 1962-11-06 Adamant Lab Proprietary Ltd High-pressure die
US3091804A (en) * 1961-05-24 1963-06-04 Barogenics Inc Hydrostatic press for an elongated object
US3103699A (en) * 1959-01-08 1963-09-17 Barogenics Inc Super-high pressure apparatus
US3123862A (en) * 1964-03-10 Ultra-fflgh pressure device
US3550199A (en) * 1967-12-11 1970-12-29 Asea Ab Press for treating products under high pressure
US3664801A (en) * 1969-05-23 1972-05-23 France Etat Apparatus for developing high fluid pressure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123862A (en) * 1964-03-10 Ultra-fflgh pressure device
US3103699A (en) * 1959-01-08 1963-09-17 Barogenics Inc Super-high pressure apparatus
US3061877A (en) * 1959-11-05 1962-11-06 Adamant Lab Proprietary Ltd High-pressure die
US3091804A (en) * 1961-05-24 1963-06-04 Barogenics Inc Hydrostatic press for an elongated object
US3550199A (en) * 1967-12-11 1970-12-29 Asea Ab Press for treating products under high pressure
US3664801A (en) * 1969-05-23 1972-05-23 France Etat Apparatus for developing high fluid pressure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013394A (en) * 1974-08-19 1977-03-22 National Forge Company Hot isostatic press system

Also Published As

Publication number Publication date
FR2135255A1 (enrdf_load_stackoverflow) 1972-12-15
FR2135255B1 (enrdf_load_stackoverflow) 1976-08-06
JPS5746959B1 (enrdf_load_stackoverflow) 1982-10-06
DE2221487B2 (de) 1975-08-28
DE2221487A1 (de) 1972-11-16
SE346714B (enrdf_load_stackoverflow) 1972-07-17
GB1379058A (en) 1975-01-02

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